Ore-separator.



No. 639,433. Patented nec.' I9, |899.

` F. A. PRATT.

ORE SEPARATOR.

(Application mea my 1a, i899.) ("0 Modem 3 sheets-sheet F1 g. l-

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(Application led May 16, 1899.)

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UNiTnn SlTATns FATTNT Trice@ FREDERICK A. PRATT, OF BUTTE, MONTANA, ASSIGNOR OF TWO-TIIIRDS TO CLEMENT BARTZEN AND ARTHUR II. VVETHEY, OF SAME PLACE.

O RE-S EPARATO R.`

SPECIFICATION forming part of Letters Patent No. 639,433, dated December 19, 1899.

Application filed May 16, 1899. Serial No. 717,110. (No model.)

T @ZZ whm 77H03/ OHUGWM able sheathing B. Within the frame and Be it known that I, FREDERICK A. PRATT, a sheathing is supported a conical screen O, citizen of the United States, residin gin Butte, which may be of any suitable material and of Silver Bow county, Montana, have invented any suitable mesh. In the drawings the up- 55 certain new and useful Improvements in Oreper part of the screen is shown as formed of separators, of which the following is a speciy a perforated plate, the size of the apertures iication, reference being had to the accompabeing exaggerated for convenience in drawnying drawings, forming a part hereof. ing, and the lower part of the screen is rep- This invention relates to apparatus emresented as formed of wire. A dished dia- 6o 1o ployed in the concentration of ores for the phragm D is shown as forming a sort of floor purpose of separating the fine particles of within the screen, such diaphragm having an crushed ore from the coa-rser particles. Vaopening CZ in its central and lowest part. A rions devices have been suggested or elnvertical shaft E, having a suitable drivingployed for this purpose-such as revolving pulley c, is supported in suitable bearings 65 screens,hydraulic sizers,&c.-and while some centrally' with respect to the funnelshaped have been used in the absence of any better screen and carries two buckets or distributers device they are all more or less open to ob- F and F', the one above the diaphragm l) and jection. the other below the same. The upper bucket It is the object of this invention to produce F is preferably divided by vertical partitions 7o zo an improved device or machine for the purf into separate compartments, the iioors f of pose referred to which shall be simple and twoofthecompartmentsbeingarrangedatdifinexpensive both in construction and in operaferent heights above the floor of the first comtion, shall not be liable to become clogged or partment, which is also the main floor or botblinded in use nor to the consequent reductom of the bucket or distributer. In the outer 75 2 5 tion of capacity of the machine, shall be cawall of each compartment, just above its iioor, pable of treating large quantities of ore in a is an opening f2, through which the ore is given time, and shall elfect a thorough sepathrown, in the rapid rotation of the distriburation, not permitting the fine particles to pass ter, against the screen,and the arrangement of along with the coarse, and thereby necessitate separate compartments with iioors and open- 8o 3o repeated working over of the ore. In the imings at different heights insures a proper and proved machine the screen is stationaryand even distribution of the ore over the surface is disposed in funnel form around a rapidlyof the adjacent screen without loading the revolving distributer. The fine particles pass distributer. It is evident that without any through the screen into a surrounding recepother parts than those just referred to the 85 tacle, while the coarse particles drop down ore will be thrown against the screen at all through the open bottom of the funnel. ltimes with the same force, depending upon The invention Will be more fully described the rapidity of rotation of the distributer; hereinafter with reference to the accompanybut in order to permit the force with which ing drawings, in which, for purposes ofv exthe ore is thrown against the screen to be 9o 4o planation, it is illustrated as embodied in a regulated and controlled to some extent, as convenient structure. the character of the ore and other conditions In the drawings, Figure l is a vertical cenmay render desirable, each opening is protral section of a machine which embodies the vided with a delivery-pipe f3, having an exinvention. Fig. 2 is a plan view of the same, tensible section f4, which can be secured by 95 a portion of the casing being removed. Fig. friction in adj usted position, and thereby 3 is a plan view of the same with the hopper regulate to some extent the force with which and driving-pulley removed and the distribthe material is thrown against the screen, uting-spouts broken 0E. thus preventing unnecessary wear on the As represented in the drawings, the mechscreen and also preventing the clogging or roo ro anism is supported by a suitable framework blinding of the screen. The lower distribu- A, the sides of which are inclosed by a suitter or bucket F is represented as having a 'cated at A2.

single compartment and a single extensible delivery-pipe, as already described with reference to the upper distributer; but obviously it might have more compartments and delivery-pipes if desired.

A hopper G or any other suitable means may be provided for delivering the material to the upper distributer F. As the latter is rotated at a high speed, the material will be thrown forcibly against the screen C. The fine particles will pass through the same and will fall upon the inclined floor A and thence will pass into the chute or receptacle indi- The vcoarse particles will pass down through the opening d. in the dished diaphragm D into the lower distributer F. From this the material willbe thrown against the screen, and any fineV particles that may have passed along with the coarse will go through the screen upon the floor A. The coarse particles will `fall down through the open bottom of the funnel-shaped screen, which is extended through the inclined floor A', and will pass into the chute C,from which they can be taken tothe rolls to be reground.

It will be obvious that the improved machine can be driven with a comparatively small lamount of power and yet is capable of treating thoroughly a large amount of material in a given time. There are no parts to get out of order, and if it should be necessary at anytime to r'eneW the screen the old screen can be removed and a new one placed in position without difculty. There is no danger that the screens will become blinded, and the capacity of the machine therefore will not be diminished in use. Furthermore, the improved machine is compact and takes up considerably less space than other machines intended for the same purpose.

I claim as my inventionl. A machine for separating ores comprising a funnel-shaped screen and a rotating bucket or distributer centrally disposed within said screen, said bucket or distributer having an opening in its side wall and an extensible delivery-pipe through which the material is thrown against the screen, substantially as shown and described.

2. A machine for separating ores comprising a funnel-shaped screen and a rotating bucket or distribu ter centrally disposed within said screen, said bucket or distributer be` ing divided by partitions into separate compartments, said compartments having floors at diierent heights, and each of said compartments having an opening in its side wall above its oor through which the material is thrown against the screen, substantially as shown and described.

This specification signed and witnessed this 6th day of May, A. D. 1899.

FREDERICK A. PRATT. ln presence of J. K. HEsLn'r, W. H. HENRY. 

